I see on several Facebook group, many Xiaomi users have requested a guide to enable USB debugging and unlock developer options on their devices we have developed a simple tutorial to activate developer options and USB debugging on Android Mi phones. You must enable USB debugging when you Install custom ROMs, update the ROM, or root your handset. To enable USB debugging, you need to first unlock developer options your Xiaomi device. Follow the steps below to enable USB debugging on Xiaomi mobile phones. To enable USB debugging on Xiaomi Redmi devices, the developer options should be unblocked first.